MPs’ rental agreements will reveal the extent of what critics claim is the
“back-door funding” of political parties when they are published for the
first time next month.

The documents will show how much public money is being funnelled to local
parties and unions under leasing arrangements for constituency offices. MPs
are braced for another expenses storm following publication by the Independent
Parliamentary Standards Authority (IPSA).

About a quarter of MPs are believed to rent constituency offices from their
local parties, including some of the most senior in all three main political
parties. The arrangements are allowed as long as